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-rw-r--r--openbsd-compat/timingsafe_bcmp.c35
1 files changed, 35 insertions, 0 deletions
diff --git a/openbsd-compat/timingsafe_bcmp.c b/openbsd-compat/timingsafe_bcmp.c
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+++ b/openbsd-compat/timingsafe_bcmp.c
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+/* $OpenBSD: timingsafe_bcmp.c,v 1.1 2010/09/24 13:33:00 matthew Exp $ */
+/*
+ * Copyright (c) 2010 Damien Miller. All rights reserved.
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/* OPENBSD ORIGINAL: lib/libc/string/timingsafe_bcmp.c */
+
+#include "openbsd-compat.h"
+
+#if !defined(HAVE_TIMINGSAFE_BCMP)
+
+int
+timingsafe_bcmp(const void *b1, const void *b2, size_t n)
+{
+ const unsigned char *p1 = b1, *p2 = b2;
+ int ret = 0;
+
+ for (; n > 0; n--)
+ ret |= *p1++ ^ *p2++;
+ return (ret != 0);
+}
+
+#endif /* !defined(HAVE_TIMINGSAFE_BCMP) */